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椒江河口洪季最大浑浊带核部的悬沙分选机制 预览 被引量:3

Size distribution of suspended sediment in nucleus band of turbidity maximum of Jiaojiang River Estuary in wet season
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摘要 以实测悬沙粒径、流速、含沙量资料为基础,通过悬沙不同粒级组分、中值粒径以及粒度参数的统计,分析椒江河口最大浑浊带核部悬沙粒径分布变化特性。研究表明,悬沙粒径分选主要受物质来源、潮流动力作用下底部部分物质再悬浮和絮凝沉降3个因素的影响。其中第二个因素起主导作用,大潮期比小潮期显著,第三个因素的作用主要发生在涨落憩前后低流速期,并在表层较近底层的水体明显。 On the basis of date on particle size, current velocity and sediment concentration, the paper discusses the characteristics of size distribution of suspended sediment by means of the statistics of different size fractions and median diameters and also particle size parameters of suspended sediment. The results show that the size distribution of suspended sediment is mainly influenced by three factors: sediment sources, resuspension of bottom sediment by tidal force, and flocculated settling of suspended sediment. Of which, the second factor is dominative, and the action during the spring tide is more remarkable than that during the neap tide. The action of the third factor becomes active in slack water when the current velocity is low, and more remarkable in the surfer layer than in the lower layer near the bed.
作者 徐海 李伯根 XU Hai, LI Bo-gen (Second Institute of Oceanography, SOA, Hangzhou 310012, China)
出处 《海洋通报》 CAS CSCD 北大核心 2009年第5期 64-73,共10页 Marine Science Bulletin
基金 基金项目:浙江省自然科学基金资助项目(499029)和国家自然科学基金资助项目(40376029)
关键词 椒江河口 最大浑浊带核部:悬沙粒径 絮凝作用 再悬浮 Jiaojiang River Estuary nucleus band of turbidity maximum particle size of suspended sediment locculation resuspension
作者简介 作者简介:徐海(1981-),男,硕士研究生,主要从事河口海岸动力沉积及其工程应用研究。电子邮箱:hehaixuhai@163.com
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